sorry it took me a few days, i haven't picked up the horn for a while
as per the other thread, i have 4 adjustment holes (all are below the original ring).
the top three holes cause the neck to swing towards me, and the bottom hole swings away (falls away?) when just supported by the neck strap.
i found that starting at the top hole, the pressure on BOTH thumbs was greatest. i had to push away more with left thumb, and hold up more with right thumb.
going down the next two holes reduced pressure on both thumbs. the third hole is where i usually have it (at the modern yamaha balance position).
interestingly, when i went to the bottom hole.. the sax overbalances, and this reduces the left thumb pressure, to the point where the sax falls away, BUT, it also increased the right thumb pressure, as the whole sax had to be controlled by it...
so there is definitely a sweet spot to reduce the pressure on both thumbs, and have more weight/balance taken/provided by the strap. past that point, it goes wobbly again...
edit: that was for slightly infront position....
If i put the sax to the side.. so the weight is nearly all taken vertically (?) by the strap, moving to a higher hole reduced right thumb, but made left thumb much worse... hmm, i think i'm confused now